Application of CSC Technology in Nonferrous Metallurgy
211
➂ Continuous blowing in side blowing fuming furnace
This project adopts the continuous blowing process of side blowing fuming furnace, and the side blowing fuming furnace and smelting furnace are arranged in the
same workshop. The hot slag from the reduction furnace is directly and continuously
injected into the fuming furnace through the chute, which reacts with the pulverized
coal and oxygen-enriched air. The flue gas (dust) produced is recovered by the waste
heat boiler and collected by the bag type dust collector. The waste gas is combined
with the acid-making tail gas and discharged by the chimney after desulfurization.
The smoke and dust (i.e., secondary zinc oxide products) collected by the waste heat
boiler and dust collector are pneumatically transmitted to the zinc smelting production system as production raw materials. After the slag from the fuming furnace is
precipitated by water crushing, it is grabbed into the car by 5T grab crane, transported
by car to the slag yard for temporary storage, and then sold to the cement plant as
building materials.
(5) Main characteristics:
➀ CSC oxygen-enriched air side-blown furnace is adopted for oxidation smelting,
reduction smelting, and fuming.
➁ Continuous operation, i.e., continuous feeding and slagging, improves automation level, avoids low-altitude pollution, improves occupational hygiene environment, and reduces manpower quota.
(6) Main equipment specifications and technical parameters:
• Main equipment: Oxidation furnace: 21 m
2 , reduction furnace: 13.5 m
2 ,
fuming furnace: 12 m
2 .
• Main technical parameters:
Smelting temperature of oxidation furnace
1050 °C
Slag type of oxidation furnace
Fe/SiO 2 = 1.1 CaO/SiO 2 = 0.6–0.7
Smoke dust rate of oxidation furnace
8–12%
Oxygen-enriched air concentration of oxidation
furnace
85–95%
Smelting temperature of reduction furnace
1200 °C
Smoke dust rate of reduction furnace
10%
Oxygen-enriched air concentration of reduction
furnace
55–75%
Slag lead of reduction furnace
≤2.5%
Lead in waste slag of fuming furnace
0.2–0.3%
Zinc in waste slag of fuming furnace
≤2%
211
➂ Continuous blowing in side blowing fuming furnace
This project adopts the continuous blowing process of side blowing fuming furnace, and the side blowing fuming furnace and smelting furnace are arranged in the
same workshop. The hot slag from the reduction furnace is directly and continuously
injected into the fuming furnace through the chute, which reacts with the pulverized
coal and oxygen-enriched air. The flue gas (dust) produced is recovered by the waste
heat boiler and collected by the bag type dust collector. The waste gas is combined
with the acid-making tail gas and discharged by the chimney after desulfurization.
The smoke and dust (i.e., secondary zinc oxide products) collected by the waste heat
boiler and dust collector are pneumatically transmitted to the zinc smelting production system as production raw materials. After the slag from the fuming furnace is
precipitated by water crushing, it is grabbed into the car by 5T grab crane, transported
by car to the slag yard for temporary storage, and then sold to the cement plant as
building materials.
(5) Main characteristics:
➀ CSC oxygen-enriched air side-blown furnace is adopted for oxidation smelting,
reduction smelting, and fuming.
➁ Continuous operation, i.e., continuous feeding and slagging, improves automation level, avoids low-altitude pollution, improves occupational hygiene environment, and reduces manpower quota.
(6) Main equipment specifications and technical parameters:
• Main equipment: Oxidation furnace: 21 m
2 , reduction furnace: 13.5 m
2 ,
fuming furnace: 12 m
2 .
• Main technical parameters:
Smelting temperature of oxidation furnace
1050 °C
Slag type of oxidation furnace
Fe/SiO 2 = 1.1 CaO/SiO 2 = 0.6–0.7
Smoke dust rate of oxidation furnace
8–12%
Oxygen-enriched air concentration of oxidation
furnace
85–95%
Smelting temperature of reduction furnace
1200 °C
Smoke dust rate of reduction furnace
10%
Oxygen-enriched air concentration of reduction
furnace
55–75%
Slag lead of reduction furnace
≤2.5%
Lead in waste slag of fuming furnace
0.2–0.3%
Zinc in waste slag of fuming furnace
≤2%